Conditions
Pityriasis rosea: what it is and how long it lasts
Pityriasis rosea is a rash that starts with one larger pink, oval patch (the herald patch) and, days later, spreads as smaller patches over the chest, back and belly. It looks alarming, but it is not dangerous, not thought to be contagious, and it goes away on its own, usually in 4 to 8 weeks. The doctor can recognize it by video and help with the itch.
Is it an emergency? Call 911.
Is this an emergency?
This is not an emergency service. Call 911 or go to the nearest emergency room if you have:
- A rash with high fever and spots that do not fade when pressed
- Blisters, mouth sores or peeling skin
- A rash with trouble breathing or swelling of the face or tongue
Help lines
At a glance
Pityriasis rosea
Common symptoms
- A herald patch: pink, oval and larger than the rest
- Pink or oval patches on the chest, back or belly
- Fine scales on the patches
- Itching, mild or strong
- Other names
- Christmas tree rash
- Usual test
- None in most cases; sometimes a blood test to rule out syphilis
- Treatment
- Clears on its own; itch relief with moisturizers, hydrocortisone and antihistamines
On this page(8)
What is pityriasis rosea?
Pityriasis rosea is a skin rash believed to be caused by a virus. According to MedlinePlus, it is most common in young adults, in women more than men, and in fall and spring.
It is not thought to spread from person to person. It can be frightening to watch it spread, but it clears by itself.
How we help by video
You see Dr. Diana Nieves Castro, a Puerto Rico–licensed general practice physician with several years of emergency-department experience, in English or Spanish. Pityriasis rosea is recognized by its shape and pattern: the doctor checks it on camera and, if she asks, you can send photos through the secure link.
We evaluate, diagnose and treat. The doctor tells it apart from look-alike rashes such as a fungal skin infection or eczema. Some infections, such as syphilis, can cause a similar rash: if it needs to be ruled out, we give you a lab order for a lab near you. See also syphilis.
If appropriate, the doctor prescribes something for the itch and we send your prescription to your pharmacy.
Your doctor
Dr. Diana Nieves Castro, MD
General practice physician
Several years of emergency-department experience.
Founding Executive Director of The Health Initiative.
Your visit in 3 steps
Request a visit online 24/7 — we confirm your time by email or text See how our online doctor visit works.
Request your visit.
Book a visit and choose "Doctor visit". You pay by card when you request it.
See the doctor by video.
We send you a secure video link. It works on your phone, tablet or computer.
Get your plan.
The doctor explains what to expect and, if needed, gives you a lab order or prescribes for the itch.
What the visit costs
Pityriasis rosea is handled in a US$79 doctor visit, the same price for every age, with no membership. You pay by card when you request the visit, and you get a full refund if the visit can't take place. The lab charges separately. See prices.
Pityriasis rosea symptoms
It starts with a single large patch, the herald patch. Several days later more patches appear, which can follow the lines of the skin and form a "Christmas tree" pattern on the back. Some people have a headache, tiredness, a sore throat or a mild fever before the rash.
- A herald patch: pink, oval and larger than the rest
- Pink or oval patches on the chest, back or belly
- Fine scales on the patches
- Itching, mild or strong
Treatment and how long it lasts
It does not need treatment to go away: according to MedlinePlus, an episode usually lasts 4 to 8 weeks, sometimes only 3 and sometimes up to 12. Treatment is for the itch.
What helps: gentle lukewarm baths, moisturizers, hydrocortisone cream and, if the itch keeps you up at night, an oral antihistamine. Moderate sun can help, without burning: see how to avoid sunburn.
If you are pregnant: the American Academy of Dermatology advises letting your obstetrician know if you develop pityriasis rosea during pregnancy.
When to get in-person care or go to the ER
Pityriasis rosea is not an emergency. For your safety, get in-person care or call 911 if you notice:
- A rash with high fever and spots that do not fade when pressed
- Blisters, mouth sores or peeling skin
- A rash with trouble breathing or swelling of the face or tongue
How we care for you
We evaluate, diagnose and treat; if needed, we give you a lab order for a lab near you.
We see adults and children of all ages. Patients under 21: a parent with patria potestad (parental authority) or a legal guardian is on camera for the whole visit and shows photo ID.
Real-time video visit. We send you a secure video link. It works on your phone, tablet or computer.
If appropriate, the doctor prescribes and we send your prescription to your pharmacy. We do not prescribe controlled substances.
You must be physically in Puerto Rico during the visit (visitors, tourists and cruise passengers are welcome).
In an emergency, call 911.
Frequently asked questions
Is pityriasis rosea contagious?
How long does pityriasis rosea last?
What is a herald patch?
Do I need tests?
About this page
Author: The Health Initiative
Medical care provided by Dr. Diana Nieves Castro, MD (PR license 24027)
Disclosure: Founding Executive Director of The Health Initiative
Published: 2026-10-02 · Updated: 2026-10-02
Sources (2)
- Pityriasis rosea (MedlinePlus, NIH) (opens in a new tab) (accessed 2026-10-02)
- Pityriasis rosea: overview (American Academy of Dermatology) (opens in a new tab) (accessed 2026-10-02)